Two point charges are located as shown in the figure, with charge q1 = +3.5 C at x = ?3.0 m, y = 0, and charge q2 = +2.2 C at x = +1.0 m, y = +2.0 m. An electron is now taken from a point very far away and placed at the origin. How much work must be done on the electron to move it to the origin?